January weather forecast
Portsmouth, Dominica

Portsmouth, Dominica greets the year with considerably wet weather in January. This significant rainfall can create a distinctly humid atmosphere. On average, precipitation amounts to 144mm across 18 days. Maritime influences result in mild sea temperatures, providing a soft and enjoyable environment for water activities. Notably, the level of rainfall decreases as the month progresses into February.

Temperature

During the coldest month in Portsmouth, January, temperatures average a high of 28°C and a low of 21°C.

Rainfall

In Portsmouth, in January, during 18 rainfall days, 144mm of precipitation is typically accumulated. Throughout the year, there are 214 rainfall days, and 2252mm of precipitation is accumulated.

Sea temperature

In Portsmouth, in January, the average water temperature is 27.1°C.
Note: Between the temperatures of 25°C and 29°C, water is considered very warm, providing pleasure in water activities without discomfort over lengthy periods.

Daylight

In Portsmouth, the average length of the day in January is 11h and 20min.
On the first day of January in Portsmouth, sunrise is at 06:32 and sunset at 17:46. On the last day of the month, sunrise is at 06:35 and sunset at 18:03 AST.

Sunshine

In Portsmouth, the average sunshine in January is 7h.

UV index

The average daily maximum UV index in January is 9. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In January, the maximum UV index of 9 suggests these recommendations:
Act with urgency in protecting yourself. Without it, skin and eyes can be harmed in no time. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Despite the cloud cover, sunscreen with an SPF of at least 30 should be generously applied and reapplied, particularly after a swim or an outdoor workout. Watch out! Reflections from sand and water can surge UV radiation exposure.